The world in brief

Donald Trump said he will impose a 50% tariff on EU imports from June 1st, claiming that trade talks with the bloc are “going nowhere”. He also threatened a 25% tariff on iPhones made outside America, pressuring Apple to shift production from China and India. The announcements rattled markets: Apple shares fell 4% and Europe’s Stoxx 600 index dropped nearly 2%.

A judge in Boston temporarily blocked the Trump administration’s effort to revoke Harvard University’s ability to enrol international students. She agreed that the move, which Harvard called unconstitutional and politically motivated, would cause “immediate and irreparable injury”. Kristi Noem, America’s homeland-security secretary, said the action follows Harvard’s failure to provide records on alleged misconduct by foreign students; the university disputed those claims.